Mario van Doorn

2 old videos with fewer than 5,000 views from this channel.

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• 4:24 Hubblecast 02: Galaxy bars and supermassive black holes

  Mario van Doorn

  939 views · 12 December 2007

• 5:01 Hubblecast 03: Celebrating Hubble's 17th birthday

  Mario van Doorn

  762 views · 12 December 2007